On 18/04/2012 02:11, Nick Sabalausky wrote:
Can't you just query compile-time information to see what classes inherit
from Base? Then you could just try downcasting to them.
Last time I checked there was no way to do that (I doubt that will have
changed). It's impossible to know all the subclasses until link-time, so
you'll get different results depending on how you compile your project.
The only way around this that I've found is to put a mixin in all
subclasses to register them with the base class... That's a complete
hack though.
Example:
----
// a.d
class Base { /* whatever magic to get derived classes */ }
// b.d
import a;
class Derived : Base {}
void main() {}
----
$ dmd -c a.d
dmd does not know about b.d when compiling a.d. The only way this could
work is to allow link-time code generation.
--
Robert
http://octarineparrot.com/
